DIN ETS 300917:2001 Digital cellular telecommunications system (Phase 2+) - GSM Application Programming Interface (GSM-API) (Endorsement of the English version ETS 300917:1998-05 as German standard)
2001DIN ETS 300917:2001 Digital cellular telecommunications system (Phase 2+) - GSM Application Programming Interface (GSM-API) (Endorsement of the English version ETS 300917:1998-05 as German standard)